Respuesta :
After one round of the cac, the radioactive carbons are found in All four Carbon.
With an atomic nucleus made up of 6 protons and 8 neutrons, carbon-14, often known as radiocarbon, is a radioactive carbon. The radiocarbon dating technique was developed by Willard Libby and colleagues to date samples from anthropology, geology, and hydrogeology on the basis of its existence in organic molecules. At the University of California Radiation Laboratory in Berkeley, California, Martin Kamen and Sam Ruben made the discovery of carbon-14 in February of 1940. Franz Kurie has hinted to its possibility in 1934. There are three carbon isotopes that exist naturally on Earth, the most abundant of which is carbon-12, which accounts for 99% of all carbon. The chemical characteristics of the many carbon isotopes are little different from one another. A method known as carbon labeling uses this similarity in chemical and biological research:
Question
all four carbon atoms of oxaloacetate are labeled with radioactive 14c. the labeled oxaloacetate is incubated with all of the enzymes, substrates, and cofactors necessary for the citric acid cycle (cac). after one round of the cac, where do you expect to find the radioactive carbons?
A) all four carbon atoms.
B) no pattern that is predictable from the information provided.
C) none of its carbon atoms.
D) the keto carbon and one of the carboxyl carbons.
E) the two carboxyl carbons.
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